'Laura' still a big part of Kelly Maixner's pack
                                
                                
                                    (Newser) -
                                    A blind dog is helping musher Kelly Maixner find the Iditarod finish line in Alaska. The 5-year-old, 50-pound sled dog named Laura has a cornea disease called pannus, reports Anchorage television station  KTUU . But Laura is comfortable running in every spot on Maixner's sled team—except lead. When the...